Speed-variator.



G. M. GONRADSON.

SPEED VARIATOR.

APPLICATION FILED NOV. 12, 1910.

Patented Aug. 20, 1912.

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SPEED VARIATOR.

APPLICATION FILED NOV. 12, 1910.

Patented Aug. 20, 1912.

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ink/EN E C. M CONRADSON.

SPEED VARIATOR.

APPLICATION FILED NOV. 12, 1910.

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SPEED VARIATOR.

APPLIOATION FILED NOV. 12, 1910.

Patented Aug. 20, 1912.

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' UNITED STATES PATENT OFFICE.

CONRAD IL CONB LADSON, MADISON, WISCONSIN, ASSIG NOB TO MAIHSON MACHINE COMPANY, OF MADISON, WISCONSIN, ACORPORATION OF ,WISCONSIN.

SPEED-VARIATOR.

Specification of Letters Patent.

Application filed November 12,- 1910. Serial No. 591,832.

Be it known that I, CONRAD M. CONRAD- soiv, a citizen of the United States, and a resident of Madison, in .the county of Dane and State of Wisconsin, have invented a new and Improved Speed-Variator, of which the following is a specification.

This invention pertains to means for varying, as desired, the relative speeds or-rates of rotation of a drivin and a driven shaft and relates more espec1ally to that class of such mechanisms in which there are rovided oneach shaft two cone pulley sections or-disks with their apexes facing each other and with such pulley sections on each shaft movable relatively to and from each'other longitudinally of the shaft. In such structures the motion is transmitted from one shaft to the other bya belt engaging and wedging between the pulley sections on each shaft, ,the structure of the belt being preferably adapted to such wedging action. For varying the relative speeds of the shafts the pulley sections are moved toward each' other on one shaft and correspondingly apart on the other shaft. I

The object of my present invention'is to provide mechanism operated by fluid pressure, preferably hydraulic, for actuating the pulley sections toward and from each other on the shafts and with the thrust exerted by such -mechanism sustained entirely in the way of a longitudinal stress upon the shafts or members carried thereby. As an illustration of such fluid pressure actuated mechanism I have shown and described hydraulically operated mechanism.

The accompanying drawings showing only diagrammatically a mechanism of the character and for the purpose described are as follows, Y

Figure 1 is a plan view of the mechanism. Fig. 2 is a side view of the pulley-s or wheels only of such a mechanism adjusted toefi'ect a substantially equal rate of rotation for both of the .shafts; the belt being indicated in the positibn for securing such,result. The

result. Fig.4 'isa transverse vertical section through approximately the center of the controlling valve of the mechanism. Fig. 5 is a longitudinal section taken diametrically through the center of one of the shafts and the mechanismcarried thereby. Fig. 6 shows in plan view a detail of the connecting means between one of the conical pulley sections and its actuatin mechanism. Fig. 7 is a transverse sectiona view of the hub of one of the wheels taken on the line m-g of Fig. 5. Fig. 8 is a diagrammatic view of a modified mechanism foractuating the conical pulley sections on the shafts showing the cylinder of such mechanism partially in section.

Throughout the severa' views of the drawings similar parts are designated by similar reference characters.

Referring to the drawings,-for supporting the shafts in my speed variator I make use of connected hangers or standards T, such as shown in Flgs. 1 and 2, and in which '1 are connecting girders and T are inclosing casings for the bearin s E adjustably secured therein by means 0 the adjusting bolts 0 threaded through the bosses t. The standards T have foot pieces, which may be connected as seen at T". The shafts are indicated at S and S either one .of which may be supposed to be the driven and the other one the driving shaft. For actuating the movable one of the pair of conical pulley sections on each of these shafts I may employ any preferred mechanism for con- .;necting such pulley sections with the mov-.

which the shafts S and S are'tubular and are revolubly supported in the bearings E in the usual way. On the shaft S is seen a. disk D provided with a hub al through which is threaded the bolt n for securing the disk D on the shaft S against angular or longitudinal movement. On this shaft S thereis-also seen a similar disk D but longitudinally slidable thereon and actuated longitudinally of such shaft by mean's'of' the mechanism now-to be described, being had more especiall to Fig 5. This shaft S tubular and tie .wall' thereof is provided, near the center of the shaft, with slots 8 opening outwardly from the bore reference lbs thereof and through which there engages the' actuating bar extending outwardly also through slots provided therefor in the hub d of the disk D and secured in such hub so as to carry the disk D therewith by means of bolts 0 threaded into the hub (Z and the bar 0 asclearly indicated in Figs. and 7.

which is secured the bar 0, while the main portion of the rod P is reduced in diameter 'as indicated so as to freely slide within the tubular shaft S.

The right hand end 8 of the shaft S is threaded and has secured thereon a cylinder A held against angular movement by the set screw a, and .within this cylinder there is slidably fitted .the piston head P The cylinder A is provided at its center with a stufling box a having threaded thereover a follower a of the usual construction in order that a fluid tight joint may be made between the head of the cylinder A and the fixed supply pipe '02 permitting the rotation of the cylinder A. The shaft S has similarly supported thereon the fixed disk G carrying a hub 0 and secured in place by means of a .bolt n while the disk 0 has a hub c, and secured in the slot therein by means of bolts 0 is seen the bar 0 secured in the right hand end of a piston rod exactly like the rod P, the left hand end of which, with reference to Fig. 1, carries a piston head, not seen, but working within the cylinder B, also having a head and a stufiing box I) at its center and threaded thereover the follower b the structure being in all respects the sameas that already described for Fig. 6.

By means of-the stufiing box b there is maintained a fluid tight joint between the cylinder head and the pipe '0 of a character permitting the rotation of the cylinder. The cylinder B is connected through the system of ipin '0, '1)? and 2 with a valve chamber w ile the cylinder A is similarly connected through a similar system of piping 0 11 and '0 with the valve chamber H. The valve chamber H is providedwith bosses h and if within which there is secured the pipes 01 and o". The chamber H is also provlded with bosses b and k in which .are secured respectively the pipes a and 4: This chamber H is'connected with one side of a pump U through the system of piping '0 'v and o and to the other side of the pump U through the system of piping '0 '0 and '0 Referring now to Fig. 4,the valve chamber H has therein-the rotatable valve G having ducts therethrough g and g the shaft S with reference to,

adapted, when operating handle thereof 9' connecting the pipes '0 and o and similarly the duct 9 assumes the-position indicated at g in dotted lines connecting the pipes v and 0?. The pump U is provided with an operating handle U andthe usual piston and piston rod, the outer end of which articulates with the handle U as seen at u while the lower end of the handle articulates with one end of the link u the other end of which latter articulates with an ear u carried by the pump U. The pump U is of substantially the usual construction provided with a check valve preventing the return therethrough of water from the pipe '22 and also a check valve preventing a return from the pump of water into the pipe '0 whereby the circulation caused by the pump when operated is always in the direction indicated by the full arrows. The result of this is that the circulation through thesystem of piping c o and '0 the pump Uand piping e '0 and v is always in the direction indicated by the full arrows, and with the handle N in the position indicated in full lines, theoperation of the pump draws the water from the cylinder B and forces the same into the cylinder A forcing the disk D to the left permitting the disk C to move to the left as it is acted upon by the trans mission belt indicated at R in Figs. 2 and 3. When the handle N is moved over to'the right to the position indicated at N in Fig. 4 the operation of the pump draws the water from the cylinder A and forces the same into the cylinder B and effects a reverse operation of the disks C and D, and in this case the direction of the flow through the piping 7), 11 a), '0 '0 and 'v is indicated by the half arrows in Fig. 1. Thus it will be seen that the position of the valve handle N determines the directions of the movements of the disks C and D effected by the operation of the pump U and correspondingly the relative rates of rotation of the shafts carrying such disks. It will also be readily understood that the entire thrust exerted both in adjusting the relative position of the disks against the belt and also the thrust exerted by'the belt itself on the disks tending to separate them is received in the way of a longitudinal tension on the shafts S and S reducing the necessary weight of the parts to a minimum. The disks C, C, D and D may preferably be provided with ribs 1' extending radially outwardfrom the hubs thereof for stifi'eningthe cone surfaces of such disks.

Refer now to Fig. 8. a modified mechanism for actuating the pistons P and P In this arrangement I make use of a cylinder M suitably mounted on thebase M and having therein the piston m secured on the hollow piston rod within which there is threaded the operating screw operating wheel J. This screw j has tion but to prevent longitudinal -movement thereof 'within such bearing as indicated indotted lines. From the cylinder M there extend leads k and k which may contain valve chambers with suitable valves therein having connected to the stems thereof the levers k and is connected to work together amount of fluid from the other cyl nder 1s permitted to pass-through the pipe connecting the same with the cylinder M on the other side of the piston m. The operation of the lever k -cuts off, when desired, com- 'munication between the cylinder M and the A and B in the manner clearly cylinders indicated. By the use of this modification of the actuating mechanism the action of the pistons is rendered more uniform and any possible disadvantage" resulting from the pulsatmgaction of the mechanism hereinbefore described is, entirely removed. v

It is believed from the foregoing descri tion of the construction and o eratlon of the several features of m spee variator that the'method of using t e same is sufiiciently clear to call for .no further explanation herein.

What .I claim is:-

, 1. In a device for the purpose describem in'combmation with the two shafts, .a pair, of relatively movable coned ulley sections oneach shaft;vfor eachimova leconed pulley section and operatively connected therewith, a separate reservoir containing fluid under pressure and means, e-xerting a ,lon-.. gitudinal stress on the shafts, forqefi'ectinginverse relative movements between the pulley sections on the shafts comprising means nversely the volumes of fluid for varylng 1 1n the reservoirs,

4.2. vIn a device for the purpose described, in combination withthe .two shafts,-a pair This figure shows having secured on its upper end the a bearing in the upper end of an upwardly extendingarm M of a character to permit rota-,

:of relatively movableconed ulley sections on each shaft; for each move. le coned puliley section and operatively connected therewith, a separate reservoir containing fluid lllIldeI pressure and means, exerting a longiitudinal stress on the shafts, for effecting,

simultaneous inverse relative movements beltween the pulley sections on the shafts comprising means for varying simultaneously land inversely the volumes of fluid in the ireservoirs.

3. In a device for the purpose described, iin combination with the two shafts, a air 10f relatively movableconed pulley sections ionaeach shaft; for each movable .coned pul- Iley section and operatively connected therewith, a separate reservoir containing fluid :under pressure and means for effecting ineve'rse'relative movements between the pulley sections onvthe shafts comprising means for jivarying. inversely the volumes of fluid in the EI'GSBIVOIIS. 4. In a device for the purpose described, iin combination with the two shafts, a pair iofrelatively movable coned ulley sectlons on each shaft; for each mova le coned pullley section and operatively connected thereiwlth, .a separate reservoir containing fluld [under pressure and means for effecting s1- ;multaneous inverse relative movements beitween the pulley sections on the shafts comiprising means for varying simultaneously .and inversely the volumes of fluid in the :reservoirs.

T5. ?In a device for the purpose described, in combination withthe two shafts, a pair iof relatively movable coned ulley sections 2011 each shaft; 'for each mova le coned pulleysection and operatively connected theretwlth, a separate reservoir containing fluid iunder pressure; means, exerting a longitudiinal stress on the shafts, for effecting inverse relative movements between the pulley sections on the shafts comprising means for Lvarying inversely the volumes of fluid in the reservoirs and members operatively conmeeting; the .moveible pulley sections withthe, reservoirs adapted to sustain by longitudinal stress the thrust exerted by the inverse rela- ';tive movement efi'ecting means, v,

6. In a device for the purpose described, in combination with the two shafts, a pan.

of IeIativeIymovabIe conedulley sections pn each shaft; for: each move le coned -pul-' ley section and operatively connected therewith, a separate 'reservoin-containingfluid under pressure; means, enertin a. ongitudinal-stresson-theshaits, for e ectin simulta'neou's iinverseirelative movements tween .the pulley flflfitions ion=the shafts comprising means. for va ingsimultaneously, and -in- 'versely ithe iv umes of :fluidin the reser-' voirs and "members operatively connecting the movable pulley sections with the user Y with, a separate reservo1r containing fluid 10- under pressure; means for efiecting inverse relative movements between the pulley secftions on the shafts comprising means for varyinginversely the volumes of fluid in the reservoirs, and members operatively connecting the movable pulleysections with the reservoirs adapted to sustain by longitudinal stress the thrust exerted by the inverse rela-, tive movement effecting means.

8. In a device for thepurpose described, in combination with thetwo shafts,a pair of relatively movable coned pulleysections on each shaft; for each movable coned pulley section and operatively connected there with, a separate reservoir containing fluid under pressure; means for effecting simultaneous inverse relative movements between the pulley sections on the shafts comprising means for varying simultaneously and inversely the volumes of fluid in the reservoirs and members operatively connecting the movable pulley sections with the reservoirs adapted to sustain by longitudinal stress the thrust exerted by the inverse relative movement' effecting means.

9. In a device for the purpose described, in combination with the two shafts, a pair of relatively movable coned pulley sections on each shaft; for each movable coned pulley section and operatively connected there:

with a separate cylinder containing fluid under pressure and a piston movable in the cylinder and means, exerting a longitudinal stress on the shafts and permitting rotation thereof, for effecting inverse relative movements between the pulley sections on the shafts comprisingmeans' for varying inversely the volumes of fluid-in the cylinders. 10. In a device for the purpose described, in combination with the two shafts, a pair of relatively movable coned pulley sections on each shaft; for each movable coned pulley section and operatively connected therewith, a separate cylinder containing fluid under pressure, and a piston movable in the cylinder and means, exerting a longitudinal stress on the shafts and permitting rotation thereof, for effecting simultaneous inverse relative movements between the pulley sections on the shafts comprising means for varying simultaneously and inversely the volumes of fluid in the cylinders.

11. In a device for the purpose described, in combination with the two shafts, a pair of relatively movable coned pulley sections on each shaft; for each movable coned pulle coned pul-" in combination with the two shafts,

psaeeoley section and operatively connected there with, a separate cylinder containing fluid under pressure, and a piston movable in thev cylinder and means for efl'ecting inverse relative movements between the pulley sec-- tions on the shafts comprising means for varying inversely the volumes of fluid in the cylinders.

,12. In a device for the purpose described, in combination with two shafts, a pair of relatively movable coned pulley sections on each shaft; for each movable coned pulley section and operatively connected therewith,

a separate'cylinder containing fluid under pressure, and a piston movable in the cylinder. and means for effecting simultaneous inverse relative movements between the pulley sections on the shafts comprising meansfor varying simultaneously and inversely the volumes of fluid in the cylinders.

13. In a device for the purpose described, a pair of relatively movable coned pulley sections on each shaft; for each movable pulley section and operatively connected therewith a separate cylinder containing fluid under pressure, and a piston movable in the cylinder; means, exerting a longitudinal stress on the shafts, and permitting rotation thereof, for effecting inverse relative movements between the pulley sections on the shafts comprising means for varying inversely the volumes of fluid in the cylinders and members connecting the movable pulley sections with the pistons adapted to sustain, by longitudinal stress the thrust exerted by the inverse relative movement eflecting means. 14. In a device for the purpose-described, 1n of relatively movable coned pulley sections on each shaft; for each'movable coned pulley section and operatively connected therewith, a separate cylinder containing fluid under pressure, and a piston movable in the cylinder; means, exerting a longitudi nal stress on the shafts and permitting rotation thereof, for effecting simultaneous inverse relative movements between the pulley sections on the shafts comprising means for varying simultaneously and inversely the volumes of fluid in the cylinders and members connecting the movable pulley sections with the pistons adapted'to sustain, by 1ongi-tudinal stress the thrust exerted by the inverse relative movement effecting means. 7

15. In a device for the purpose described, in combination with the two shafts, a air of relatively movable coned pulley sections on each shaft; for each movable coned pulley section andsoperat-ively connected therewith, a separate cylinder containing fluid under pressure and a piston movable in the cylinder; means foreffecting inverse relative movements between the pulley sections on the shaftscomprising means for varying combination with the two shafts, a 'ipalr inversely the volumes of fluid in the cylinders and members connecting the movable pulley sections with the pistons adapted to sustain, by longitudinal stress the thrust exerted by the inverse relative movement effecting means. 1

16. In a device for the purpose described, in combination with the two shafts, a air of relatively movable coned pulley sectlons on each shaft; .for each movable coned pulley section and operatively connected-therewith a separate cylinder containing fluid under pressure and a piston movable in the cylinder; means for effecting simultaneous inverse relative movements between the pulley sections on the shafts comprising means for varying simultaneously and inversely the volumes of fluid in the c linders and members connecting the movab e pulley sections with the pistons adapted to sustain, by longitudinal stress the thrust exerted by the inverse relative movement effecting means.

CONRAD M. CONRADSON. Witnesses:

FLORENCE B. SPENSLEY, Rnx WELTON. 

